72805155386248 has 8 divisors (see below), whose sum is σ = 136509666349230. Its totient is φ = 36402577693120.

The previous prime is 72805155386239. The next prime is 72805155386251. The reversal of 72805155386248 is 84268355150827.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 72314648455204 + 490506931044 = 8503802^2 + 700362^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 72805155386248.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4550322211633 + ... + 4550322211648.

Almost surely, 2^{72805155386248} is an apocalyptic number.

It is an amenable number.

72805155386248 is a deficient number, since it is larger than the sum of its proper divisors (63704510962982).

72805155386248 is a wasteful number, since it uses less digits than its factorization.

72805155386248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9100644423287 (or 9100644423283 counting only the distinct ones).

The product of its (nonzero) digits is 129024000, while the sum is 64.

The spelling of 72805155386248 in words is "seventy-two trillion, eight hundred five billion, one hundred fifty-five million, three hundred eighty-six thousand, two hundred forty-eight".